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linux/Documentation/networking
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Vladimir Oltean 4e50025129 net: dsa: generalize overhead for taggers that use both headers and trailers 
Some really really weird switches just couldn't decide whether to use a
normal or a tail tagger, so they just did both.

This creates problems for DSA, because we only have the concept of an
'overhead' which can be applied to the headroom or to the tailroom of
the skb (like for example during the central TX reallocation procedure),
depending on the value of bool tail_tag, but not to both.

We need to generalize DSA to cater for these odd switches by
transforming the 'overhead / tail_tag' pair into 'needed_headroom /
needed_tailroom'.

The DSA master's MTU is increased to account for both.

The flow dissector code is modified such that it only calls the DSA
adjustment callback if the tagger has a non-zero header length.

Taggers are trivially modified to declare either needed_headroom or
needed_tailroom, based on the tail_tag value that they currently
declare.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-06-11 12:45:38 -07:00
..
caif tty_port: drop last traces of low_latency 2021-01-07 16:17:32 +01:00
device_drivers net/mlx5: Bridge, add tracepoints 2021-06-09 18:36:12 -07:00
devlink Documentation: devlink rate objects 2021-06-02 14:08:37 -07:00
dsa net: dsa: generalize overhead for taggers that use both headers and trailers 2021-06-11 12:45:38 -07:00
mac80211_hwsim docs: net: convert two README files to ReST format 2019-07-31 13:31:56 -06:00
6lowpan.rst docs: networking: convert 6lowpan.txt to ReST 2020-02-28 14:52:36 +01:00
6pack.rst docs: networking: convert 6pack.txt to ReST 2020-04-28 14:38:38 -07:00
af_xdp.rst xsk: Documentation for XDP_SHARED_UMEM between queues and netdevs 2020-08-31 21:18:00 +02:00
alias.rst docs: networking: Convert alias.txt to rst 2018-07-18 15:28:27 -07:00
arcnet-hardware.rst docs: networking: arcnet-hardware.rst: don't duplicate chapter names 2020-05-01 12:24:43 -07:00
arcnet.rst Documentation: networking: arcnet: drop doubled word 2020-07-04 17:46:21 -07:00
atm.rst docs: networking: convert atm.txt to ReST 2020-04-28 14:38:38 -07:00
ax25.rst Documentation: networking: ax25: drop doubled word 2020-07-04 17:46:21 -07:00
bareudp.rst Documentation: bareudp: Corrected description of bareudp module. 2020-07-28 17:53:03 -07:00
batman-adv.rst batman-adv: Fix typos and grammar in documentation 2020-06-26 10:36:30 +02:00
bonding.rst docs: networking: bonding.rst Fix a typo in bonding.rst 2021-03-01 13:53:21 -08:00
bridge.rst docs: networking: Convert bridge.txt to rst 2018-07-18 15:28:27 -07:00
can_ucan_protocol.rst Documentation: networking: can_ucan_protocol: drop doubled words 2020-07-04 17:46:21 -07:00
can.rst can: add a note that RECV_OWN_MSGS frames are subject to filtering 2021-04-24 14:36:51 +02:00
cdc_mbim.rst docs: networking: convert cdc_mbim.txt to ReST 2020-04-28 14:38:39 -07:00
checksum-offloads.rst docs: networking: convert netdev-features.txt to ReST 2020-04-30 12:56:36 -07:00
dccp.rst net: dccp: Add SIOCOUTQ IOCTL support (send buffer fill) 2020-07-22 17:00:37 -07:00
dctcp.rst docs: networking: convert dctcp.txt to ReST 2020-04-28 14:38:39 -07:00
decnet.rst docs: networking: convert decnet.txt to ReST 2020-04-28 14:39:45 -07:00
dns_resolver.rst docs: networking: convert dns_resolver.txt to ReST 2020-04-28 14:39:46 -07:00
driver.rst docs: networking: convert driver.txt to ReST 2020-04-28 14:39:46 -07:00
eql.rst docs: networking: convert eql.txt to ReST 2020-04-28 14:39:46 -07:00
ethtool-netlink.rst ethtool: add missing EEPROM to list of messages 2021-04-19 16:29:43 -07:00
failover.rst
fib_trie.rst docs: networking: convert fib_trie.txt to ReST 2020-04-28 14:39:46 -07:00
filter.rst bpf, docs: Fix literal block for example code 2021-04-27 17:31:09 +02:00
gen_stats.rst docs: networking: convert gen_stats.txt to ReST 2020-04-28 14:39:46 -07:00
generic_netlink.rst docs: networking: convert generic_netlink.txt to ReST 2020-04-28 14:39:46 -07:00
generic-hdlc.rst docs: networking: convert generic-hdlc.txt to ReST 2020-04-28 14:39:46 -07:00
gtp.rst docs: networking: convert gtp.txt to ReST 2020-04-28 14:39:46 -07:00
ieee802154.rst docs: net: ieee802154.rst: fix C expressions 2020-10-15 07:49:41 +02:00
ila.rst docs: networking: convert ila.txt to ReST 2020-04-28 14:39:47 -07:00
index.rst Documentation: net: Document resilient next-hop groups 2021-03-29 13:51:38 -07:00
ip_dynaddr.rst docs: networking: convert ip_dynaddr.txt to ReST 2020-04-28 14:39:47 -07:00
ip-sysctl.rst ipv6: Add custom multipath hash policy 2021-05-18 13:27:32 -07:00
ipddp.rst docs: networking: convert ipddp.txt to ReST 2020-04-28 14:39:47 -07:00
ipsec.rst docs: networking: convert ipsec.txt to ReST 2020-04-28 14:39:47 -07:00
ipv6.rst docs: networking: convert ipv6.txt to ReST 2020-04-28 14:40:18 -07:00
ipvlan.rst docs: networking: convert ipvlan.txt to ReST 2020-04-28 14:40:18 -07:00
ipvs-sysctl.rst Documentation: networking: ipvs-sysctl: drop doubled word 2020-07-04 17:46:21 -07:00
j1939.rst can: j1939: add tables for the CAN identifier and its fields 2020-11-20 09:43:29 +01:00
kapi.rst wimax: move out to staging 2020-10-29 19:27:45 +01:00
kcm.rst docs: networking: convert kcm.txt to ReST 2020-04-28 14:40:19 -07:00
l2tp.rst docs: networking: add tracepoint info to l2tp.rst 2020-08-22 12:44:37 -07:00
lapb-module.rst docs: networking: convert lapb-module.txt to ReST 2020-04-30 12:56:35 -07:00
mac80211-auth-assoc-deauth.txt
mac80211-injection.rst doc: networking: wireless: fix wiki website url 2020-06-08 10:05:53 +02:00
mpls-sysctl.rst docs: networking: convert mpls-sysctl.txt to ReST 2020-04-30 12:56:36 -07:00
mptcp-sysctl.rst mptcp: restrict values of 'enabled' sysctl 2021-05-28 13:59:16 -07:00
msg_zerocopy.rst doc: fix link to MSG_ZEROCOPY patchset 2019-03-18 09:50:21 -07:00
multiqueue.rst docs: networking: convert multiqueue.txt to ReST 2020-04-30 12:56:36 -07:00
net_dim.rst docs: networking: add full DIM API 2020-04-10 18:11:04 -07:00
net_failover.rst docs: networking: net_failover: Fix a few typos 2020-03-03 16:07:02 -08:00
netconsole.rst docs: networking: convert netconsole.txt to ReST 2020-04-30 12:56:36 -07:00
netdev-FAQ.rst docs: networking: drop special stable handling 2021-03-03 08:49:08 -08:00
netdev-features.rst net: hsr: add offloading support 2021-02-11 13:24:44 -08:00
netdevices.rst docs: net: explain struct net_device lifetime 2021-01-08 19:27:41 -08:00
netfilter-sysctl.rst docs: networking: convert netfilter-sysctl.txt to ReST 2020-04-30 12:56:36 -07:00
netif-msg.rst docs: networking: convert netif-msg.txt to ReST 2020-04-30 12:56:36 -07:00
nexthop-group-resilient.rst Documentation: net: Document resilient next-hop groups 2021-03-29 13:51:38 -07:00
nf_conntrack-sysctl.rst docs: networking: convert nf_conntrack-sysctl.txt to ReST 2020-04-30 12:56:36 -07:00
nf_flowtable.rst docs: nf_flowtable: fix compilation and warnings 2021-03-25 17:42:02 -07:00
nfc.rst docs: networking: nfc: change to rst format 2019-11-23 11:00:19 -08:00
openvswitch.rst docs: networking: convert openvswitch.txt to ReST 2020-04-30 12:56:36 -07:00
operstates.rst docs: networking: convert operstates.txt to ReST 2020-04-30 12:56:37 -07:00
packet_mmap.rst docs: networking: packet_mmap: fix old config reference 2021-01-04 13:21:46 -08:00
page_pool.rst net: page_pool: Add page_pool_put_page_bulk() to page_pool.rst 2020-11-24 14:56:54 -08:00
phonet.rst docs: networking: convert phonet.txt to ReST 2020-04-30 12:56:37 -07:00
phy.rst docs: networking: phy: Improve placement of parenthesis 2021-03-12 12:29:11 -08:00
pktgen.rst docs: networking: convert pktgen.txt to ReST 2020-04-30 12:56:37 -07:00
plip.rst docs: networking: convert PLIP.txt to ReST 2020-04-30 12:56:37 -07:00
ppp_generic.rst docs: update ppp_generic.rst to document new ioctls 2020-12-10 13:57:36 -08:00
proc_net_tcp.rst docs: networking: convert proc_net_tcp.txt to ReST 2020-04-30 12:56:37 -07:00
radiotap-headers.rst docs: networking: convert radiotap-headers.txt to ReST 2020-04-30 12:56:37 -07:00
rds.rst docs: networking: convert rds.txt to ReST 2020-04-30 12:56:37 -07:00
regulatory.rst doc: networking: wireless: fix wiki website url 2020-06-08 10:05:53 +02:00
rxrpc.rst Documentation: networking: rxrpc: drop doubled word 2020-07-04 17:46:21 -07:00
scaling.rst docs: networking: update XPS to account for netif_set_xps_queue 2020-10-13 16:21:54 -07:00
sctp.rst docs: networking: convert sctp.txt to ReST 2020-04-30 12:56:38 -07:00
secid.rst docs: networking: convert secid.txt to ReST 2020-04-30 12:56:38 -07:00
seg6-sysctl.rst doc: move seg6_flowlabel to seg6-sysctl.rst 2021-04-14 13:13:15 -07:00
segmentation-offloads.rst networking: : fix typos in code comments 2019-05-20 20:24:34 -04:00
sfp-phylink.rst net: mdio: Remove of_phy_attach() 2021-02-17 13:17:49 -08:00
snmp_counter.rst net-next: docs: Fix typos in snmp_counter.rst 2021-01-05 17:07:38 -08:00
statistics.rst docs: networking: extend the statistics documentation 2021-04-16 16:59:20 -07:00
strparser.rst docs: networking: convert strparser.txt to ReST 2020-04-30 12:56:38 -07:00
switchdev.rst Documentation: networking: switchdev: add missing "and" word 2021-03-17 12:34:34 -07:00
sysfs-tagging.rst Documentation: better locations for sysfs-pci, sysfs-tagging 2020-10-09 09:33:23 -06:00
tc-actions-env-rules.rst docs: networking: convert tc-actions-env-rules.txt to ReST 2020-04-30 12:56:38 -07:00
tcp-thin.rst docs: networking: convert tcp-thin.txt to ReST 2020-04-30 12:56:38 -07:00
team.rst docs: networking: convert team.txt to ReST 2020-04-30 12:56:38 -07:00
timestamping.rst docs: networking: timestamping: update for DSA switches 2021-04-27 14:10:15 -07:00
tipc.rst net/tipc: add TIPC chapter to networking Documentation 2020-12-01 15:38:39 -08:00
tls-offload-layers.svg Documentation: add TLS offload documentation 2019-05-22 12:18:20 -07:00
tls-offload-reorder-bad.svg Documentation: add TLS offload documentation 2019-05-22 12:18:20 -07:00
tls-offload-reorder-good.svg Documentation: add TLS offload documentation 2019-05-22 12:18:20 -07:00
tls-offload.rst net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled 2021-01-19 15:58:05 -08:00
tls.rst net/tls: add TlsDeviceRxResync statistic 2019-10-05 16:29:00 -07:00
tproxy.rst docs: networking: convert tproxy.txt to ReST 2020-04-30 12:56:38 -07:00
tuntap.rst docs: networking: convert tuntap.txt to ReST 2020-05-01 12:24:40 -07:00
udplite.rst docs: networking: convert udplite.txt to ReST 2020-05-01 12:24:40 -07:00
vrf.rst docs: networking: convert vrf.txt to ReST 2020-05-01 12:24:40 -07:00
vxlan.rst docs: vxlan: add info about device features 2020-09-28 12:50:12 -07:00
x25-iface.rst net: x25: Queue received packets in the drivers instead of per-CPU queues 2021-04-05 11:42:12 -07:00
x25.rst net: x25: Remove unimplemented X.25-over-LLC code stubs 2020-12-12 17:15:33 -08:00
xfrm_device.rst docs: networking: Fix a typo 2021-03-20 19:02:42 -07:00
xfrm_proc.rst docs: networking: convert xfrm_proc.txt to ReST 2020-05-01 12:24:40 -07:00
xfrm_sync.rst docs: networking: convert xfrm_sync.txt to ReST 2020-05-01 12:24:41 -07:00
xfrm_sysctl.rst docs: networking: convert xfrm_sysctl.txt to ReST 2020-05-01 12:24:41 -07:00